The regulator did not provide further details in its statement, published on Tuesday.
Black Sea Star placed a three-year 4.5 million euro ($5.3 million) bond issue on August 14. The issue comprises 4,500 bonds with a nominal value of 1,000 euro each.
The bonds will be repaid in one installment on their maturity date. Interest will be paid quarterly.
Black Sea Star, established in 2017, had almost no operations in 2019, according to its annual financial statement.
($ = 0.8464 euro)